Port EdkUnixPkg to UnixPkg. The changes are listed as follows:

1. change *.msa to *.inf, and create platform configuration files .dec&.dsc&.fdf to comply with Edk2 build process
2. using PCD mechanism to replace macro.
3. change Sec code to cowork with PI1.0 Pei Core and produce temparory memory ppi. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5380 6f19259b-4bc3-4df7-8a09-765794883524

UnixPkg/Library/DxeUnixLib/DxeUnixLib.inf

@@ -0,0 +1,50 @@
+#/** @file
+# A library to produce the global variable 'gUnix'
+#
+# This library contains a single global variable 'gUnix' along with a constructor to initialize that global.
+# Copyright (c) 2006 - 2008, Intel Corporation.
+#
+#  All rights reserved. This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution. The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = DxeUnixLib
+  FILE_GUID                      = f39efc84-8985-11db-ad67-0040d02b1835
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = UnixLib 
+  EDK_RELEASE_VERSION            = 0x00020000
+  EFI_SPECIFICATION_VERSION      = 0x00020000
+
+  CONSTRUCTOR                    = UnixLibConstructor
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources.common]
+  UnixLib.c
+
+
+[Packages]
+  MdePkg/MdePkg.dec
+  UnixPkg/UnixPkg.dec
+
+[LibraryClasses]
+  HobLib
+  DebugLib
+
+
+[Protocols]
+  gEfiUnixThunkProtocolGuid                     # PROTOCOL ALWAYS_CONSUMED
+